Question 2.1: (a) In the compound magnesium fl uoride, magnesium (atomic s...
(a) In the compound magnesium fl uoride, magnesium (atomic symbol
Mg) and fl uorine (atomic symbol F) combine in a ratio of 1:2. What
is the formula of magnesium fl uoride?
(b) The formula of perchloric acid is HClO4. What are the combining
ratios of the elements in perchloric acid?
Strategy
The formula gives the atomic symbol of each element combined in the
compound, and subscripts give the ratio of its constituent elements.
(a) The formula is MgF_{2}. We do not write a subscript of 1 after Mg.
(b) Both H and Cl have no subscripts, which means that hydrogen and
chlorine have a combining ratio of 1:1. The subscript on oxygen is 4.
Therefore, the combining ratios in HClO_{4} are 1:1:4.
Related Answered Questions
Question: 2.3
Verified Answer:
Strategy
Determine the atomic number (the number o...
Question: 2.4
Verified Answer:
Atomic numbers for these elements are found in the...
Question: 2.2
Verified Answer:
(a) The mass number is 58 + 78 = 136.
(b) The mass...
Question: 2.5
Verified Answer:
(a) Oxygen-16 has 16 - 8 = 8 neutrons. Its symbol ...
Question: 2.6
Verified Answer:
\left(\frac{78.99}{100}\times \overset{\ove...
Question: 2.7
Verified Answer:
Nitrogen, atomic number 7, has the following groun...